It is slightly more difficult but it's worth it. I've never use an orbital buffer so I dont know how easy it would be to remove it with one.
If you choose to get Klasse, you'll notice that the directions for the sealant glaze read "apply a thin coat"...........and they mean THIN. The thicker it's applied, the harder it is to get off.

I've used/use both. The "All-in-one" is basically a cleaner wax and I recommend that you use it (or any cleaner wax) before applying the Sealant Glaze. It will make removing the sealant glaze much easier. I wouldn't use the "all-in-one" by itself because I dont think it has any protective qualities.

Clay
89 420 SEL
02 Forester
97 Jetta TDi *For Sale*